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9/4/2013Spherical Equivalent: 2 Steps1. Combine ½ of the cylinder power to thesphere2. Drop the axisLet’s Do ItRx: -1.00 +1.00 x 1801. Combine ½ of the cylinder power to the sphere(+1.00 / 2) =+0.50 Combined with -1.00 = -0.502. Drop the axisSpherical equivalent is: -0.50 sphereNow You Do ItRx: +2.00 -0.50 x 090Spherical equivalent is: +1.50 sphereNo part of this document can be copied with out permission from EyeTrain4You, Inc. 4
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